package com.ruoyi.common.utils.sign;


import java.io.*;
import java.util.Base64;//我这里的base64来自于jdk1.8

/**
 * @Description TODO
 * @Author CAI ZHAI
 * @Date 2021/8/3 11:40
 **/
public class Base64Utils{
    private static String path = "D:\\linxia";
    
    /**
     *
     * @param path
     * @return String
     * @description 将文件转base64字符串
     * @date 2018年3月20日
     * @author changyl
     */
     
    public static String fileToBase64(String path) {
        String base64 = null;
        InputStream in = null;
        try {
            File file = new File(path);
            in = new FileInputStream(file);
            //byte[] bytes = new byte[in.available()];
            byte[] bytes=new byte[(int)file.length()];
            in.read(bytes);
            base64 = Base64.getEncoder().encodeToString(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return base64;
    }
    
    public static void base64ToFile(String base64, String fileName) {
        File file = null;
        //创建文件目录
        String filePath=path;
        File  dir=new File(filePath);
        if (!dir.exists() && !dir.isDirectory()) {
            dir.mkdirs();
        }
        BufferedOutputStream bos = null;
        FileOutputStream fos = null;
        try {
            byte[] bytes = Base64.getDecoder().decode(base64);
            file=new File(filePath+"\\"+fileName);
            fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            bos.write(bytes);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bos != null) {
                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    
    public static void main(String[] args) {
        String s = fileToBase64("D:\\linxia\\123.png");
    
        base64ToFile(s, "1.png");
    }
}
